Demonstration-globe



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DEMONSTRATION GLOBE.

APPLICATION FILED IuLv 22.1919.

. 1,343,181. i PatentedJune 81,1920.

2 SHEETS-SHEET l.

mnt' ummm .IIIIIIL Humm' L IVI. MANSON.

DEMONSTRATION GLOBE.

' APPLICATION FILED IuLY 2`2, I9I9.

Patented Jun@ 8, 1920.

2 SHEETS-SHEET 2.

IN V EN TOR /l//msofm///I/vsou BY mam@ "FFME MABSDEN MANSON, OF BERKELEY, CALIFORNIA.

DEMNSTRTON-GLBE.

.'Lseaieii.

Specification of Letters Patent.

Patented 5i une 8, 1920.

Application filed July 22, 1919. Serial No. 312,565.

T0 all lwhom it may concern.'

Be it known that 1, MARsnnN Manson, a citizen of the United States, and a resident of the city of Berkeley, county of Alameda, and State of California, have made a new and useful invention-to wit, Demonstration-Globe; and l do hereby declare the following to be a full, clear, concise, and exact description of the same.

My invention has for its object the providing of mechanism for supporting and giving movements to a model of the earth or other' planetary body,l lt will be understood that there are two principal motions to be imparted which for purposes of demonstration may be separately or simultaneously produced by my invention. During the movement of the globe, it is preferably to be exposed to a beam of light which is to 'simulate the exposure of the earth to solar radiation during an axial and seasonal movement. My invention is adapt ed primarily for illustration and educational purposes and may, to advantage, be used in producing` moving pictures, which by extensive distribution reach a large number of audiences. In utilizing my invention I may employ also that covered by United States Letters Patent issued to me on December 31st, 1918, No. 1,289,81f9, and to which reference is herein made. Y

In the accompanying drawings the invention is illustrated in the form considered the best, but it is to be understood that I do not limit myself to such form, as it may be embodied in numerous other forms, and it is also to be understood that in and by the claims following the description, it is desired to also cover the invention in whatsoever form it may be embodied.

In the accompanying drawings:

Figure 1 is a side elevation of my inven-- tion with one of the side plates of the inclosing and supporting base removed for the purpose of better illustrating the working of the mechanism.

Fig. Q, is a top plan view of the carriage mechanism.

Fig. 3 is a cross section taken on the line III H1 of Fig. 1.

Fig. 4 is a fragmentary detail view of a part of the shifting mechanism.

Referring to the drawings in detail, the number 5 designates thc standard for the plates of the base portion, which carry curved parallel tracks 6, 6. A second set of curved parallel tracks 7, 7 are mounted below the tracks 6, and adjacent theseV last mentioned tracks are curved rack bars 8 8. rllhese tracks 6 and 7 are to support and guide the carriage 9, as shown in Fig. 3. This carriage is provided with shafts 11 and 11n upon which are mounted flanged wheels 12u12 and 121 and 12, which travel upon the tracks 7-7 and are kept from moving out of contact with said tracks by the upper tracks 6. |The shaft 11 is provided with gears 13 and 1&1 mounted on its ends and adjacent to said wheels 12 and in a position to mesh with the rackbars 8-8. The carriage 9 has depending members 16 and 17, which ksupport an electric motor 18 upon one side of said depending members which carry also asecond shaft 19. T his shaft 19 carries at its outer ends weights 20 and Q0a rigidly secured thereto. el drum 21 is mounted to rotate freely on the said shaft 19, and carries a cam slot 22, and a pin 23 upon one side and near the periphery. A disk 2li adjacent said drum 21 is keyed to the shaft 19, and is provided at its periphery with a cut-away portion 25, within which cut-away portion said pin 23 projects. The rotary movement of the drum is thus controlled by the pin 23 within the limits of the cut-away portion 25. At a2, 42, l2 l have shown the direction arrows indicating the illumination of the side of the planetary model 40 from a source of light not shown in the drawings, but well known.

A cross brace 26 is provided between the members 16 and 17 to support a pivoted shiftingrlever 27 carrying a roller 28 on its lower end adapted to travel in said cam slot Q2. The upper end of this lever 27 is bifurcated and is adapted to engage the collars 29 and 89 carried upon the tubular member 3l free to slide upon but constrained to rotate with shaft 11.. rhis tubular member carries miter gears 32 and 3f-l adapted to be brought alternately into contact with miter gear carried 'upon a vertical shaft 35 projecting upwardly and supported by the carriage 9. The shaft 85 is rotated through the medium of a worm gear 36 driven by a worm 87, which in turn is driven by the motor 1S.

T he operation of my device is as follows: TWhen the motor 18, connected to a suitable source of electric current, is started, the m0- tion will be transmitted through the gears contained in the housing 38 to the gears 37 and 36. This in turn Will rotate the shaft 35 which carries the globe l() on its upper end. The miter gear 34- Will likewise be rotated, and as it will be in contact with either the gear 33 or 32, motion Will be transmitted to the shaft 11 to rotate it in alternate directions with the result that the gears 1 3 and 14 will travel along the tracks 8 causing the globe 4l() to oscillate about its center A, from .which the curve of the tracks is described. This motion is coincident With the rotation about the axis 35 of the globe.

Then the carriage 9 has traveled apredetermined distance along its track, the Weights 2O and 2O1 will have reached a point Where they Will over-balance and drop by gravity to the opposite side of the line III III, as shown in dotted lines in Fig. 1. This Will result in motion being transmitted through shaft 19, disk 241, and a quick pressure will be brought upon the pin 23, which will be transmitted through the drum 21y to the camgroove 22, roller 28, lever 27, and the tubular member 31 will be slid upon the shaft 11 to disengage the gear 33 from the gear 34 and engage the gear 32 with the gear 34. The result will be that the gears 13 and 14 Will then start to travel in an opposite direction, and the globe l() Will then be oscillated about its center A in an opposite direction, While continuing its original rotation on the shaft 35.

It Will be seen by this construction that I have provided a device Which will simulate the rotation of the earth upon its axis and at the same time alternately expose its polar regions to a beam of light, and thus illus,- trate the phenomena of day and night, the seasonal exposures of the earth to solar radiation and the varying lengths of day and night at different latitudes.

It will be apparent that by the proper proI portioning of the gears and driving elements that the movements and timing may be made suitable to illustrate the movements and exposures of any of the planetary bodies, the complete cycle of oscillation corresponding with an astronomical year for the body represented.

I claim:

1. A demonstration device consisting of a globe mounted on a shaft to rotate, driving means therefor, mechanism adapted and constructed to oscillate the said rotating shaft in a plane at periodic intervals substantially as and for the 'purposes set forth.

2. Apparatus for school demonstration purposes, consisting `of a globe mounted on a shaft, a gear on said shaft, differential gear and clutch mechanism adapted to drive a second shaft from the first named shaft in either direction, means actuated by the lsecond named shaft compelling the alternate engagement of `one and disengagement of the other differential gear to cause an oscillating movement of vsaid shaft periodic with the rotation thereof.

3. Mechanism including a shaft geared to power means and adapted to revolve a planetary model upon its axis and coincident therewith to oscillate it in a plane at right angles to the plane of its equator in conibination with said planetary model and a fixed light illuminating the portions successively exposed.

ln testimony whereof, I have hereunto set my hand at San Francisco, California, this 16th day of July, 1919.

MARSDEN MANSON.

In presence of- P. S. PIDWELL. 

